A word from Geneva, the 'Duct Tape Gender Bender' costume creator:

Geneva Schult (that's me) is wearing the costume. I also fabricated the entire thing by myself. Bender the robot wore this outfit in an episode of Futurama. Other versions online are made of fiberglass or metal. I used posterboard, duct tape, dowel rods, foam core, bridal tulle, battery powered lights, magnets, electrical tape, disposable cups, LOTS of hot glue, and a ping pong ball. I made the armature out of dowel rods & foam core, then made "skin" using posterboard/duct tape. The robot wore a wig in the episode, but i substituted the crown Bender wore in the "King" episode. Almost all supplies came from the Dollar Tree.